The Yu family earn the ire of the Green Dragon clan when the daughter (Cheng Pei-Pei) kills the clan chief's son (a rapist and murderer). The Green Dragon chief wounds family head Yu Yuan with his flying daggers, and kills many others who try to protect the noble family. Wandering swordsman Ying Qing (Lo Lieh) saves the family in a fight, using his own flying dagger skills, but his allegiances and motives are unclear.